Constant temperature gas heater



' Jan. Z7, T953 0, JOHNSON 2,626,599

CONSTANT TEMPERATURE GAS HEATER Filed March 24, 1947 07 5 M JOHNSONINVENTOR ATTORNEY Patented Jan. 27, 1953 UNITED STATES PATENT OFFICECONSTANT TEMPERATURE GAS HEATER Otis MrJohnson, Dallas, Tex.

7 Application March 24, 1947, Serial No. 736,692

1 Claim.

This invention relates to heaters and the like, and has reference to agas unit for heating rooms.

An object of the invention is to provide a heating unit which is capableof quickly heating an entire room when required, yet one which willoperate economically after the room temperature has been sufficientlyraised.

Another object of the invention is to provide an automatic burner whichis capable of maintaining a smoother curve of temperature variation thanthose now used in gas heaters of the referred to type.

These and other objects of the invention will become apparent from thefollowing description of the accompanying drawings, wherein:

Figure 1 is a broken sectional view of an end of a gas heater embodyingth features of the present invention.

Figure 2 is a front elevational view, shown in partial broken section ofthe heater illustrated in Figure 1.

Figure 3 is an enlarged broken sectional view of the heat exchanger andauxiliary burner of the invention, and

Figure 4 is a broken elevational view of the auxiliary burner gas cock,the adjustable louvers, and the solenoid connected therewith.

The form of the invention illustrated includes a housing I havinginsulation 2 and 3 in the top and bottom thereof. The unit also includesa primary burner 4 having a conventional manually operated cock 5 which,in turn, is connected with a supply pipe 6 by means of a T connection 1.Above the primary burner 4 there is a heat exchanger 8 which is hollowfor radiating heat and for conducting the gas fumes upwardly into a duct9, which in turn, is connected with a vent Ill. Air is conducted to theprimary burner 4 through stationary louvers H in the back of the housingI and near the primary burner air regulator 12. An arcuate bafile I3 issecured to the rear wall of the housing I so as to direct the heatradiated fro-m the primary burner heat exchangers 8 toward the front ofthe unit, as indicated by the arrows, where it is directed into the roomthrough stationary louvers M in the upper front of the said housing.

An auxiliary burner l5, which is preferably larger than the primaryburner 4, is positioned in the lower front portion of the housing, andincludes a pilot [6 above its jets [1. The auxiliary burner l5 alsoincludes an air regulator [8, a connecting line l9, and a lever typecock 2!). The cock 20 is connected with the T I of the primary burner 4by means of a length of pipe 2|.

Above the jets I! there is a multiple of relatively large heatexchangers 22 which are hollow and enlarged at their lower ends, andcommunicate with a manifold or collector 23 at their upper ends. Thecollector 23 in turn is joined by a duct 24 with the first referred toduct 9. A comparison between Figures 1 and 2 shows the auxiliary heatexchangers 22 to be elongated in lat eral cross section.

Referring now to Figure 4, the lever 25 of the auxiliary cook 20 ismechanically connected with a double throw solenoid 26 by means of aconnecting arm 21, the movement of which is shown by dotted lines in thereferred to figure.

The solenoid 26 is electrically connected with a thermostat 2625 whichis preferably located in the side of the room to be heated which isremote from the heating unit. Louvers 28 are pivotally attached in thelower front of the housing I at their corresponding ends, and with anactuating bar 29 at their other ends, which bar, in turn, ismechanically linked with the solenoid 26 by means of another actuatinarm 30.

In operation, the primary burner 4 is lighted and is manually regulatedby the primary burner cock 5. The thermostat 251. is set for somepredetermined temperature, and when the room temperature falls below theselected increment the solenoid 26 is caused to operate the auxiliary0001; 20; By reason of the constantly burning pilot Hi, the auxiliaryburner I5 is lighted. At the same time, the adjustable louvers 28 areopened allowing additional air to enter the housing I and circulate overthe auxiliary heat exchangers 22 from where the thus heated air isreleased into the room through the upper stationary louvers M. Avertical baflie 3| is positioned between the primary heat exchangers 8and the auxiliary heat exchangers 22, as shown in Figure 1, toseparately direct air over the respective exchanger surfaces. An arcuatebaffle 32 is attached to the inner front wall of the housing I forbetter circulation of the air over the auxiliary heat exchanger 22.Similarly, the vertical baffle 3| has opposing arcuate portions 33 and34 at the top thereof for the same last referred to purpose,

By reason of the described construction and arrangement, the roomtemperature can be quickly raised as required, and after which the saidauxiliary burner is closed and room temperature is maintained by theprimary burner 4. By reason of the vertical baffie 3 I, the primaryburner 4 does not heat the metal at the lower ends of the auxiliary heatexchangers 22 nor the mass of the 3 auxiliary burner l5, thus effectingeconomy of operation.

What is claimed is:

In a heatin unit, a housing including vertical side walls, a primaryburner in the lower portion of said housing and adjacent one wallthereof, a vertically disposed tubular heat exchanger positioned oversaid primary burner, an auxiliary gas burner located within said housingadjacent said primary =burner on the side thereof opposite the firstsaid'wal l and near a second sa'idwall, a vertically disposed auxiliarytubular heat exchanger positioned over said auxiliary burner, meanscarrying off fumes from both said heat :exchangers and outwardly of saidhousing, a gas cook connected with said auxiliary burner, pivotedlouvers within the second said wall and in the lowerside thereofadjacent said auxiliary heat exchanger, thermostat control meansoperatively connected with both said gas cock and said louvers andarranged to *open'and close the same simultane- REFERENGES CITED Thefollowing references "are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 809,306 Lamson Jan. 9, 19061,546,450 Meaker July 21, 1925 1,643,705 'Dykes Sept. 27, 1927 1,9379%McKee Dec. 5, 1933 2,129,059 Herbster Sept. 6, 1938 2,333,212 SullivanNov. 2, 1943

